Heliospheric model simulation of solar wind and CME on April 18, 2014 in the ecliptic plane. From left to right and top to bottom: proton density (represented by D*R*R), strength of magnetic field (represented by B*R); dynamic pressure (represented by P*R*R), and solar wind speed (represented by V). R is the radial distance in AU. The units of the D, B, P and V are cm⁻³, nT, pPa and km s⁻¹, respectively. The red point represents the Earth. The inward field lines are shown as blue lines, and outward field lines as green lines.